Quanah Gibson-Mount pushed to branch OPENLDAP_REL_ENG_2_6 at openldap / OpenLDAP

Commits:

• cfe7566c
  by Quanah Gibson-Mount at 2021-09-15T17:34:46+00:00

  ITS#9688 - entryCSN equality indexing is highly recommended
  

• bcce534c
  by Quanah Gibson-Mount at 2021-09-15T17:34:56+00:00

  ITS#9689 - Fix redundancy in nopresent option description
  

2 changed files:

• doc/guide/admin/replication.sdf
• doc/man/man5/slapo-syncprov.5